MathB.in
New
Demo
Tutorial
About
Consider $\mathbb{Z}_{n}={}$ $\left\{\overline{0}, \overline{1},\dots,\overline{n-1} \right\}$, where $\overline{a}$ is residue class modulo $n$. Prove that for every $a\in \mathbb{Z}_n$ there exists $a^{-1}$ so that $a+a^{-1}=a^{-1}+a=1$.
ERROR: JavaScript must be enabled to render input!
Tue, 01 Apr 2014 18:39 GMT